From 3a57627e59ba18b6f9f9aae7bb60c390c0d3575a Mon Sep 17 00:00:00 2001
From: Richard-Qin-X <richard.qin.001@gmail.com>
Date: Sun, 9 Aug 2026 22:05:14 +0800
Subject: [MC] Implement RV64GC object emission

---
 backend/include/rcc/MC/MCObjectStreamer.h | 59 +++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 backend/include/rcc/MC/MCObjectStreamer.h

(limited to 'backend/include/rcc/MC/MCObjectStreamer.h')

diff --git a/backend/include/rcc/MC/MCObjectStreamer.h b/backend/include/rcc/MC/MCObjectStreamer.h
new file mode 100644
index 0000000..4a6b56c
--- /dev/null
+++ b/backend/include/rcc/MC/MCObjectStreamer.h
@@ -0,0 +1,59 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef RCC_MC_MCOBJECTSTREAMER_H
+#define RCC_MC_MCOBJECTSTREAMER_H
+
+#include "rcc/MC/MCAssembler.h"
+#include "rcc/MC/MCObjectWriter.h"
+#include "rcc/MC/MCStreamer.h"
+
+#include <cstdint>
+#include <span>
+#include <string_view>
+#include <vector>
+
+namespace rcc::mc {
+
+class ELFObjectStreamer final : public MCStreamer {
+public:
+  ELFObjectStreamer(const MCCodeEmitter &Emitter, const MCAsmBackend &Backend,
+                    const MCObjectWriter &Writer) noexcept
+      : Assembler(Emitter, Backend), Writer(&Writer) {}
+
+  [[nodiscard]] Expected<void> switchSection(MCSectionRef Section) override;
+  [[nodiscard]] Expected<void> emitLabel(MCSymbolRef Symbol) override;
+  [[nodiscard]] Expected<void> emitInstruction(const MCInst &Instruction) override;
+  [[nodiscard]] Expected<void> emitValue(MCExprRef Value, std::uint8_t Size) override;
+  [[nodiscard]] Expected<void> emitBytes(std::span<const std::uint8_t> Bytes) override;
+  [[nodiscard]] Expected<void> emitZeroFill(std::uint64_t Size) override;
+  [[nodiscard]] Expected<void> emitAlignment(std::uint64_t Alignment, std::uint8_t Fill = 0,
+                                             std::uint64_t MaximumBytes = 0) override;
+  [[nodiscard]] Expected<void> emitSymbolAttribute(MCSymbolRef Symbol,
+                                                   MCSymbolAttribute Attribute) override;
+  [[nodiscard]] Expected<void> emitSymbolSize(MCSymbolRef Symbol, MCExprRef Size) override;
+  [[nodiscard]] Expected<void> emitCommonSymbol(MCSymbolRef Symbol, std::uint64_t Size,
+                                                std::uint64_t Alignment) override;
+  [[nodiscard]] Expected<void> emitDirective(std::string_view Name,
+                                             std::string_view Arguments = {}) override;
+  [[nodiscard]] Expected<void> emitCFI(const MCCFIInstruction &Instruction) override;
+  [[nodiscard]] Expected<void> emitInlineAssembly(std::string_view Text) override;
+  [[nodiscard]] Expected<void> emitComment(std::string_view Text) override;
+  [[nodiscard]] Expected<void> finish() override;
+
+  [[nodiscard]] Expected<void> configureDwarfFrame(MCSectionRef Section, MCDwarfFrameInfo Info);
+
+  [[nodiscard]] Expected<std::vector<std::uint8_t>> takeOutput();
+
+private:
+  [[nodiscard]] Expected<void> ensureOpen() const;
+
+  MCAssembler Assembler;
+  const MCObjectWriter *Writer;
+  std::vector<std::uint8_t> Output;
+  bool IsFinished = false;
+  bool OutputWasTaken = false;
+};
+
+} // namespace rcc::mc
+
+#endif // RCC_MC_MCOBJECTSTREAMER_H
-- 
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